Non-reciprocity of dipole-exchange spin waves in thin ferromagnetic films
Non-reciprocity of dipole-exchange spin waves in thin ferromagnetic films
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DOI：
10.1063/1.4789962
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发表时间：
2013-02
影响因子：
3.2
通讯作者：
M. Kostylev
中科院分区：
文献类型：
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作者：
M. Kostylev
本文从理论上研究了偶极交换自旋波的非互易性和非对称性。我们感兴趣的是最重要的情况下的应用程序：在平面内磁化铁磁薄膜中传播的波与施加的磁场成直角。对于厚度为10-60 nm的大磁矩铁磁金属薄膜，交换能对总磁能的贡献很重要;然而，它们的动力学通常使用无交换的Damon-Bibbach方法来处理。在这项工作中，我们表明，虽然这种方法是有效的治疗波的色散，它不能正确地描述波激励的波模式配置文件等基本属性。也就是说，我们表明，基本模式的偶极交换光谱是本地化的膜表面相对的表面交换自由Damon-Eshbach…
The non-reciprocity and asymmetry of the modal profiles for dipole-exchange spin waves have been investigated theoretically. We were interested in the most important case for applications: the waves propagating in in-plane magnetized ferromagnetic films at a right angle to the applied magnetic field. For large-magnetic moment ferromagnetic metallic films with typical thicknesses 10–60 nm which are largely considered promising for magnonic and spintronic applications, the contribution of exchange energy to the total magnetic energy is important; however, their dynamics is most often treated using the exchange-free Damon-Eschbach approach. In this work, we show that although this approach is valid for treatment of wave dispersion, it fails to properly describe such fundamental property of wave excitations as wave modal profiles. Namely we show that the fundamental mode of the dipole-exchange spectrum is localized at the film surface opposite to the surface of localization of the exchange-free Damon-Eshbach ...